package com.newbsd.web.maventest.controller;

import java.io.IOException;
import java.security.MessageDigest;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class MD5Servlet
 */
public class MD5Servlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	public final static String md5(String s) {
		char hexDigits[] = { 
				'0', '1', '2', '3', 
				'4', '5', '6', '7', 
				'8', '9', 'a', 'b', 
				'c', 'd', 'e', 'f' 
		};

		try {
			byte[] btInput = s.getBytes();
			MessageDigest mdInst = MessageDigest.getInstance("MD5");
			mdInst.update(btInput);
			byte[] md = mdInst.digest();
			
			int j = md.length;
			char str[] = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println(md5("dsfAAAA"));
		System.out.println(md5("AAAAdsf"));
	}
}
